Where are you coming from? = Unde advenis?
I'm coming from my brother's (house) = A fratre venio.
I'll back (very) soon = Quam mox veniam.
I come often to the city = Venio frequens in urbem.
We have arrived long time ago = Jamdiu factum est cum (postquam) venimus.
Are you coming? Will you come? = Veniesne?/ Numnam venies (venias)?
-Sure! = Etiam./ Certe.
Are you coming or not? = Veniesne annon?
Are you coming tomorrow? = Veniesne cras?
-Yes, but in the evening = -Ego vero, sed sub vesperum.
What day are you coming (back)? = Ad quem diem (ad quae tempora) venies (redibis)?
Come here whenever you like = Ut vis, accede.
Have you just arrived? = Advenis modo?
You were to be met by me= Ego obviam tibi conabar.
You have been met by me at just the right moment= Commodum obviam mihi venisti.
You are arriving in time = Per tempus venis.
You are here quite late = Tardius (justo) venisti.
You are here a bit late = Tardiuscule venisti.
Why have you come here? = Quae te causa impulit ut huc venires?
Hurry, come back here soon! = Propera, actutum huc redi.
He comes from Africa, he is here from Africa = Adest ex Africa.
How long have you been back here? = Quampridem rediisti?
Not long ago he came to see me = Non ita pridem me convenit.
Why didn't you make him come in? = Quidni eum intro misisti?
I'll bring him here to you = Huc coram (te) adducam eum.
So, when will he be back? = Ecquando redibit?
He will come back tomorrow, at the latest = Ut tardissime cras redibit.
But who has knocked at my door? = Quisnam a me pepulit fores?
He is waiting at the door = Ad januam expectat.
Come in, otherwise I'll close the door = Ingredere, sin aliter occludam fores.